19667928129405 has 16 divisors (see below), whose sum is σ = 31468777992960. Its totient is φ = 10489530673728.

The previous prime is 19667928129401. The next prime is 19667928129427. The reversal of 19667928129405 is 50492182976691.

It is not a de Polignac number, because 19667928129405 - 2² = 19667928129401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19667928129405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19667928129401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3869916 + ... + 7369674.

It is an arithmetic number, because the mean of its divisors is an integer number (1966798624560).

Almost surely, 2^{19667928129405} is an apocalyptic number.

19667928129405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19667928129405 is a deficient number, since it is larger than the sum of its proper divisors (11800849863555).

19667928129405 is a wasteful number, since it uses less digits than its factorization.

19667928129405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3874420.

The product of its (nonzero) digits is 117573120, while the sum is 69.

The spelling of 19667928129405 in words is "nineteen trillion, six hundred sixty-seven billion, nine hundred twenty-eight million, one hundred twenty-nine thousand, four hundred five".